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所在版块:求学狮城 发贴时间:2008-06-18 12:12

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正方形ABCD,边长1m。四虫abcd,假设虫速=V,(1/V)秒后,a虫在B,b虫在C,c虫在D,d虫在A。。。变得好小哦,新正方形BCDA。。。
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